Siemens QSA2700D Bedienungsanleitung

A6V11396712

Smart Infrastructure

2020-08-17

Fine Dust Room Sensors

QSA2700D/QSA2700/AQS2700

These sensors acquire the PM2.5 and PM10 concentrations in a room.

●Operating voltage AC/DC 24V

●Signal output 0 to 10 Vdc for PM2.5 and PM10

●Communicative output, Modbus RS485

●Range of use 32°F to 122°F (0 to 50°C)/5 to 95% r.h. (non-condensing)

Siemens

A6V11396712

Smart Infrastructure

2020-08-17

Use

The fine dust room sensor is designed to measure and transmit indoor concentrations of

PM2.5 and PM10.

●0 to 10V and Modbus output

●Configurable Modbus parameters

●Quick configuration (on-event addressing) with Siemens ClimatixTM controller

●QSA2700:

–3-color LED service indication

●QSA2700D:

–2.4-inch color LCD screen for PM2.5 and PM10 values and AQI indication

–Energy efficient mode: The screen is off if no obstacle is in front of the sensor (within

3 feet [1 m] for several minutes)

–Micro USB 5 Vdc for display

–Four selectable languages: English, Chinese, German, French

–Three selectable Air Quality Index classes

Type summary

Product

number

Order number

Description

Display

QSA2700

S55720-S457

Room sensor for detection of

PM2.5 and PM10

3-color LED service indication

QSA2700D

S55720-S458

Room sensor with LCD display

for detection of PM2.5 and

PM10

2.4-inch color LCD screen for PM2.5

values, Air Quality Index, and service

AQS2700

S55720-S459

Sensor module for replacement

Order and delivery

When ordering, provide the name and product number, for example: fine dust room sensor

QSA2700.

Each product includes 1 fine dust room sensor (with a pre-installed AQS2700), 1 plastic

mounting plate and 2 screws.

Functions

Device overview

Siemens

A6V11396712

Smart Infrastructure

2020-08-17

Hole for wiring (top) for surface mounting

2 [QSA2700 only]

LED

3 [QSA2700D only]

LCD display

(power supply for display only)

5 [QSA2700D only]

Proximity sensor

Push button

Hole for wiring (bottom) for surface mounting

Hole for attaching the mounting plate to the housing

Air outlet

Air inlet

LED colors and patterns (QSA2700)

Color

Pattern

Description

Green

Permanently on

Working properly, Modbus configured

Yellow

Permanently on

Working properly, Modbus with factory settings

Red

Permanently on

Error 1, replace sensor module

Red

Flashing (0.5 s on/0. 5 s off)

Error 2, communication error

Red/yellow

Flashing (0.5 s red/0. 5 s yellow)

Possible inaccurate measurement

Modbus configuration

The device is configurable by a Modbus master device. Configure the device before

mounting. See Modbus registers (Software version 1.2.12) [➙9] and Modbus registers

(Software version 1.3.13) [➙10] for more information.

Push button operations for Modbus resetting and configuration

QSA2700:

On-event addressing is a rapid configuration approach working together with Siemens

ClimatixTM controllers.

The sensor is wired and connected to the Climatix TM controller via Modbus.

Siemens

A6V11396712

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2020-08-17

Enter addressing mode and configuration workflow using push buttons

Press the

button for

LED

Action

More details

1 to 5 seconds

Constant red

Press and hold the button

5 to 10 seconds

LED off

Release the button

Entering the addressing mode, LED

flashes yellow for 30 seconds.

●Address is temporarily set to 246.

Communication is established

automatically when:

●Baud rate is 19200 (default).

●Format is 1-8-E-1 (default).

●Address is 246.

Then:

●Master writes the Modbus

parameters.

●Master writes 1into register 4x0768

(Bus configuration command) to

activate the change.

After a successful pairing, the LED

flashes green for 60 seconds, then turns

to permanent green.

Otherwise, the LED turns back to its

original state.

LED flashes

yellow for 0 to

30 seconds

Short press the button to set

the address to 246.

If the LED is flashing, a short press of the

push button sets the address to 246.

The LED is off for 2 seconds, then turns

yellow for 2 seconds and then turns to

permanent green.

The address is 246.

Further configuration should be carried

out from the controller side.

Reset Modbus settings or cancel resetting

Press the

button for

LED

Action

More details

1 to 5 seconds

Constant red

Press and hold the button

5 to 10 seconds

LED off

Press and hold the button

10 to 13

seconds

Flash yellow

Reset Modbus setting to

factory default if releasing the

button1)

Release the button while the LED still

flashes yellow. LED keeps flashing yellow

for 3 seconds. then turns red for

1 second.

The reset is completed. LED turns to

permanent yellow.

>13 seconds

Returns to the

initial status

Cancel resetting if releasing

the button

Release after 13 seconds, resetting is

cancelled.

Remark:

1) Only Modbus address, baud rate and transmission format are reset to factory default.

Siemens

A6V11396712

Smart Infrastructure

2020-08-17

QSA2700D:

1. From the normal display page, press the push button for 2 to 10 seconds to enter the

Modbus parameter page.

2. Then, following the display indication, press the button for 2 to 10 seconds to enter the

page for Modbus configuration.

3. Select the desired operation by briefly pressing the button.

4. Following the display indication, activate the operation by pressing the button for：

•2 to 10 seconds, to configure manually;

•5 to 10 seconds, to configure the device via Climatix™ or LCD operation interface;

•10 to 20 seconds, to reset the Modbus settings.

Mechanical design

Mounting plate

Two screws

Fine dust room sensor

Product documentation

Title

Document Type

Document Number

Installation, basic operation, parameters

Mounting instructions

A6V11160930

Operation, maintenance, troubleshooting

Basic documentation

A6V11160936

CE declaration

A6V11277342

Product environmental declaration

Product environmental

declaration

A6V11284595

QSA Series Fine Dust Sensors with Selectable

Measuring Range

Submittal sheet

A6V11380383

All documentation can be downloaded at http://siemens.com/bt/download.

Notes

Security

CAUTION

National safety regulations

Failure to comply with national safety regulations may result in personal injury and property

damage.

Observe national provisions and comply with the appropriate safety regulations.

Engineering notes

Shielded cables must be used in environments with EMC problems.

Siemens

A6V11396712

Smart Infrastructure

2020-08-17

Twisted pair cables are required for the secondary supply lines and the signal lines.

Mounting

●The sensor is suitable for conduit box mounting, dry wall mounting (with mounting hole

for wires concealed) and surface mounting.

●The recommended height is 5 ft (150 cm) above the floor, especially for type with

display.

●Do not mount the sensor in recesses, shelves, behind curtains or doors, or above heat

sources.

●Avoid direct solar radiation.

●Seal the conduit box or the installation tube if any, as air currents can affect sensor

readings.

●Make sure ambient conditions are within 32 to 122°F (0 to 50°C)/5 to 95% r.h. (no

condensation).

●Do not mount device in places full of oily smoke, for example, in a kitchen.

●Peel off the protective film on air inlet and air outlet before using.

●The air inlet and outlet must be free of any blockage.

Proximity sensor

●The QSA2700D includes a built-in proximity sensor and enters into energy efficient mode

if no obstacle is detected in front of the sensor (within 3 feet [1 m] for several minutes). In

energy efficient mode, the screen is off and the sensor is working and transmitting the

signals at regular intervals. Otherwise, the screen is activated and the sensor is in

continuous working mode.

●The QSA2700 does not have a proximity sensor and is working continuously.

●Keep the proximity sensor area clean as dirt may affect the detection performance.

Replacing the AQS2700

Sensor module accuracy is influenced by ambient environment. Replace the module every 1

to 3 years depending on the local environment. In environments with continuously high

PM2.5 concentrations (that is greater than 300 μg/m3, for example, a smoking room), replace

the module more often.

To replace the sensor module:

1. Detach the housing from the mounting plate using a flat-blade screwdriver.

Siemens

A6V11396712

Smart Infrastructure

2020-08-17

2. Remove the module by hand and replace it with a new one.

NOTICE

Turn off the device before replacing the sensor module.

If not possible, insert a new sensor module 10 seconds after the old one is removed.

Disposal

The device is considered electrical and electronic equipment for disposal in

terms of the applicable European Directive and may not be disposed of as

domestic garbage.

●Dispose of the device through channels provided for this purpose.

●Comply with all local and currently applicable laws and regulations.

Siemens

A6V11396712

Smart Infrastructure

2020-08-17

Technical data

Power supply

Operating voltage

AC 24V ±20% / DC 13.5 to 35V

Frequency

50/60 Hz @ AC 24V

Power consumption

4 VA

Functional data for PM2.5

Measuring range (selectable)

QSA2700D: Select using user interface

QSA2700: Select using Modbus register 216

●0 to 500 μg/m3

●0 to 300 μg/m3

●0 to 100 μg/m3

●0 to 50 μg/m3

Unit to unit variability

Max of ±15 μg/m3 and ±15% of reading @ 77°F (25°C) and

50% r.h.

Analog output signal, (terminal U1)

0 to 10 Vdc, linear, corresponding to selected measuring range

Functional data for PM10

Measuring range (selectable)

QSA2700D: Select using user interface

QSA2700: Select using Modbus register 216

●0 to 500 μg/m3 (Default)

●0 to 300 μg/m3

●0 to 100 μg/m3

●0 to 50 μg/m3

Unit to unit variability

Max of ±15 μg/m3 and ±15% of reading @ 77°F (25°C) and

50% r.h.

Analog output signal, (terminal U2)

0 to 10 Vdc, linear, corresponding to selected measuring range

Connections

Interface

Micro USB

5V power connection for display only

Wiring connections

Screw terminals

Solid wires or prepared stranded wires: 18 to 26 AWG2

Slotted screws

Size 1, tightening torque 0.6 Nm (0.44 lb-ft).

Wiring lengths for signals.

1970 ft (600 m)

Communication

Communication Protocol

RS485 ModBus

Transmit Mode

RTU

Baud rate (configurable)

9600, 19200 (default), 38400 and 57600 BPS

Modbus address (configurable)

1 (default) to 247

Data

8 bits (0 to 255)

Parity (configurable, following the Transmission

Format)

No Parity or Odd or Even (default)

Stop bits (configurable, following the

Transmission Format)

1 (default) or 2

Max. cable length

1000 m (±200 m)

Identity

Slave

Siemens

A6V11396712

Smart Infrastructure

2020-08-17

Transmission Format (start bit - data bits –

parity –stop bit)

0=1-8-E-1 (default) / 1=1-8-O-1/

2=1-8-N-1 / 3=1-8-N-2

Bus Termination

Reset button

Yes

Modbus registers (Software version 1.2.12)

The following Modbus registers are used in software version 1.2.12 and earlier.

Holding

(16-bit)

No.

Name

Description

Default

R/W

257

PM2.5 value

Range: 0 to 500

258

PM10 value

Range: 0 to 500

260

Sensor working status

0: Normal;

1: Replace sensor

module;

2: Communication

error

296

Software version

Major version

297

Software version

Minor version

298

Software version

Build version

764

Modbus address

1 to 247

R/W

765

Baud rate

1= 9600 bps;

2 = 19200 bps;

3 = 38400 bps;

4 = 57600 bps

R/W

766

Transmission format (start bit –

data bits –parity –stop bit)

0 = 1-8-E-1;

1 = 1-8-O-1;

2 = 1-8-N-1;

3 = 1-8-N-2

R/W

768

Bus configuration command

0 = Ready;

1 = Load;

2 = Discard

R / W

Remarks:

●The register number is counted from 1.

●Register number 768 (Bus configuration command) is for ClimatixTM on-event addressing

configuration.

●Software version format: major version is 1 byte, minor version is 1 byte and build

version is 2 bytes, such as [2.01.33] = 0x02010021.

Siemens

A6V11396712

Smart Infrastructure

2020-08-17

Modbus registers (Software version 1.3.13)

The following Modbus registers are used in software version 1.3.13 and later.

Holding

(16-bit)

No.

Name

Description

Default

R/W

PM2.5 value

Range: 0 to 500

PM2.5 reliablility

0: No error

1: Bad reliability or not

available

PM10 value

Range: 0 to 500

PM10 reliablility

0: No error

1: Bad reliability or not

available

201

PM2.5 (μg/m3): Min. value in

rolling 24hours

202

PM2.5 (μg/m3): Average value in

rolling 24hours

203

PM2.5 (μg/m3): Max. value in

rolling 24hours

204

Number of particles

PM0.3…PM0.5

In pcs for particle size

between 0.3 to

0.5 micron

205

Number of particles

PM0.5…PM1.0

In pcs for particle size

between 0.5 to

1.0 micron

206

Number of particles

PM1.0…PM2.5

In pcs for particle size

between 1.0 to

2.5 micron

207

Number of particles

PM2.5…PM5.0

In pcs for particle size

between 2.5 to

5.0 micron

209

Sensor working status

0: Normal;

1: Replace sensor

module;

2: Communication

error

216

Analog output range

0: 0 to 500 μg/m3

(default);

1: 0 to 300 μg/m3;

2: 0 to 100 μg/m3;

3: 0 to 50 μg/m3

R/W

217

Temperature value via bus

-40 to 248°F (-40 to

120℃

Resolution increment

is 1 ℃

R/W

218

Relative humidity value via bus

0 to 100%

Resolution increment

is 1 ℃

R/W

219

Data receiving interval via bus (in

min) for temperature & relative

humidity

1 to 60 (min)

R/W

221

Enable temperature and relative

humidity display via bus

0: disable (default)

1: enable

R/W

1286

Software version

Major and minor

version

1287

Software version

Build version

764

Modbus address

1 to 247

R/W

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